Boiler with superheater



.B. BROIDO.

BOILER WITH SUPERHEATER.

APPLICATION FILED APR. 19, 1918,

1,41 1,704,- Patented Apr. 4, 1922.

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I pi l B. BROIDO. BOILER WITH SUPERHEATER. APPLICATION FILED APR" 19. 1918.

B. BROIDO. BOILER WITH SU PERHEATER. APPLILPATION FILED APRJIQ. 191s.

5 SHEETS-SHEET 4 $51, fi/S alto awe Patented Apr. 4, 1922.

B. BROIDO. BOILER WITH SUPEHHEATE'R. APPLICATION FILED APR; I9, 1918.

1,41 1,704. Patented Apr. 4, 1922.

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saw/11w aka/w Jnowwtoz UNITED STATES PATENT OFFICE.

esmm'm BR'OI QOF NEW YORK, N. Y.. assidrroit o afar. stirnannarna COMPANY, OF NEW YORK, N. 'Y., A CORPORATION OF DELAWARE.

Application filed April 19,

To all to]: one it may concern: I

Be it known that I, BENJAMIN BROIDO, a citizen of the United'States, and resident of the city of New York, State of New York, have invented certain new and useful Improvements in .Boilers with Superheaters, whereof the following is a specification.

My present invention relates to boilers with superheaters, and concerns itself par ticularly with boilers wherein the super heater is placed directly over the furnace.

The Object of my invention is, t provide an improved arrangement of the kind referred to in which the current of hot gases from the furnace reaches the superheater without being previously cooled by boiler sm'faces and wherein the superheater is protected from the intense direct radiation from. the furnace.

The following description is to be read in connection with the accompanying drawings. in the latter-,Fig. 1 shows in longitudinal section a boilerwith a superheater installed according to my invention; Fi 2 shows a similar view of a modification, Figs. 3 and 4 being enlarged detail views; Fig. 5 is a section on line 5 5 of Fig. 1, looking in the direction indicated by the arrows; Fig. 6 is a view similar to Fig. 5, of a modification; Fig. 7 is a sectionon line 7-7 of Fig. 8 and Fig. 8 a section on line 8-8 of F ig. 7, the two figures illustrating another modification; Fig. 9 is an enlarged perspective view of one of the'bafile elements of Fig. 6; Figs. 1,0 and 11 are sectional views of two other modifications.

Reierence will first be made to Fig. 1. Here 1 and? are respectively the upper and lowerdrums of the boiler. They are connected by the tubes Bafiies 4 direct the gases from furnace 5 on its path to the exit 6. The housing or setting 7 encloses the boiler structure. This housing has a space 8 in which is located the superheater 9. the space R being separated from the remaining space in the setting by a partition 10. The partition 10 does not extend entirely to the top of the setting but leaves a space 12. which can however be part1 or wholly closed by damper 13.

The snpcrhcatcr itscli' comprises the header 14, connected with the steam space by pipe Specification of Letters Patent.

.form part of my invention, and it makes no dlfl'erence 111st what means are used; but I 'and re-attachment of the units to the headers.

Patented Apr. 4', 1922. 1918. Serial No. 229,312.

15, and the header 1.6. connected to the point of steamconsumption by pipe 17. The two headers, preferably located outside of the setting, are made in one casting or separate, as preferred, and have connected to them and communicating with their interior the superheater units 18. of which there is anv desired number. The particular means of attaching the units to the header does not think it highly desirable that-whatever means areused shall permit Of ready detachment The units themselves are looped pipes, and it will be evident that thenumber and form of the loops may be widely varied.

Below the superheatcr, their ends resting onledges 19, are firebricks 20. These are in two rows. one above the other. and the bricks ineach row arespaced from each other, the bricks in one row being opposite the spaces in the other. (See Fig. 5.) An opening 21 in 'the front wall. ordinarily closed by the cover 252, permits access to these bricks.

- The openings 23 are for cleaning purposes. Opposite them are the openings iZ-t. closed by doors 25 whiclrwill be seen to be hinged at the top. The blower tube for cleaning is inserted through holes 23.between the superheater units, and through the openings 24. the door 25 being pushed open by the tool. hen the soot hasbecn blown ott' and the tool is withdrawn, the door 2? closes by its own weight.

The degree of super-heatmay evidently be regulated by varying the spacing be'. tween the bricks 20. which are made accessible for this and other purposes by. means of door as above mentioned. Such an adjiistment is of a morr or less pcrmanent character, For merely temporary regulation. and for entirely closing off tliefcurrent of hot gases over the snpcrhca'tcr at times when this is desirable, use is made of damper 13.-

By the arrangement described another great advantage is secured. which is that no additional opening needs 'to be provided for the removal of snpci'hcatcr units. When his desired to take out a unit for replacement. repair, claning. or some other put lUO pose, its connection to the headers is severed, the fire-brick or bricks 20 immediately un der it are removed, and the unit can then be lowered into the fire-box and thence removed through the door.

The operation of the device needs no elab ora'te description, but may be briefly stated as follows. Of the hot gases generated 1n the furnace, the main portion passes directly over the water tubes of the boiler between partition 10 and the first battle, and thence over the remaining banks of tubes. The remaining portion of the gases passes upward between the partition 10 and the front wall of the setting, through the spaces between bricks 20, over the superheater 9, through the opening 12, and so rejoins the main current of gases. Steam generated in the boiler leaves drum 1 by way of pipe 15, reaches header'14, flows thence through the superheater units 9 to header 16. and from there is carried off by pipe 17 In its passage through units 9 it is superheated by gases from the furnace which enter through the spaces between the bricks 2t). sweep along the outside of the units, and leave the superheater chamber 8 by way of the opening 12. While firing up. or when the engine is shut down and no steam flows through the units. and it is desired to protect the superheater. the damper 13 is closed. No gases will then flow through chamber 8.

As has already been pointed out, the bricks 20 do not prevent the flow of gases through chamber 8 but do prevent injury to theasuperheater units by the intense direct radiation from the furnace.

Instead of being arranged as in Fig. 5,

the bricks may be sloped tthose in the upper row in one. andthose below in the opposite direction, as lndlcated in Fig. 6. The bricks 20, one of which is shown on a larger scale in perspective. in Fig. 9, are provided with small triangular end-pieces 26, the bottoms of which rest on theledges 19, thus holding the main portions 27 in sloping position. The resulting sloping passages present an easy path for the gases. and yet prevent radiant heat from, injuring the units. This form has the advantage that the bricks are more favoral'lly placed for sustaining their own weight. and therefore stronger than when placed fiat.

As mentioned above. the passages may be increased or decreased in size by putting the bricks farther apart or closer togt.-thcr. form to permit an easier regulation at this point. is illustratcddn Figs. T and H. The lower row of bricks 21) is similar to that of Fig. 1. but the upper bricks it)" are made rotatable on the shafts 2H. liach of these shafts 28 has an arm 25) keyed to it. the arms each having their otherends secured by a pin to bar Ill). They thus move together. and they are held in the desired position by means of a pin passed through a hole in one of the arms and engaging the proper hole in the are 31.

As shown in Fig. 7, the bricks 20 are of such size and so disposed that the passage of gases may be entirely interrupted by them. The damper 13 may, if desired, be omitted in this case.

In Fig. 2, the arrangement is similar in general to that of Fig. 1. Instead of the independently constructed wall 10, the chamber 8 has as inner wall a baffle 10", which is in contact with and supported by the first row of boiler tubes. A further variation occurs in the openings in this battle 10 for cleaning. As will be seen from Figs. 3 and 4t. these openings are elongated or slot-like. The frame 31 presents a slanting face -against which the hinged door 32 closes automatically by gravity. The width of this door is such that it can open into the space between two adjacent rows of tubes.

The action of this arrangement differs.

in no mcterial way from the form first described. j w

In Fig. 10 my invention is shown applied to a boiler of a somewhat different description. The arrangement here shown is, however. equally applicable to a boilr of the form shown in Fig. 1, and vice versa.

The main difference between this and the in-eceding arrangements is that there is no dividing wall between the superheater space and the boiler space proper. The bricks 20" are again staggered and one end of each rests on one of the ledges 19, but the other, instead of being supported by brick work of any sort, rests directly against the front water tubes, the bricks being in inclined position. The location of the headers of the superheater, and the shape of the units is shown somewhat different from the preceding figures. but the units are here also readily detachable and removable by Way of the furnace door.

In its normal operation this form acts much like the forms previously described, part of the gases from the furnace passing through the spaces between the bricks and over the superheater and then rejoining the main current. The bricks 20. by their staggered arrangement. again protect the super-limiter units from injury by direct heat radiation from the furnace. These bricks also make possible regulation of the superheat. as in the first cases.

Referring to Fig. 11. there is here shown a boiler withthe front bank of water tubes in a sloping position. The upper part of the t'ront wall of the setting overhangs the lower, as at 33. and the supcrhtaiter is placed in the angle thus formed. The protecting rows of firehricks rest on ledges 15. and angles 34, the latter being secured to the front The operation of this a plurality of tubular units secured detachably to a header and two superposed rows of spaced fire bricks interposed between the furnace and the superheater, the bricks of one row being opposite .the spaces of the other, the ends of said bricks resting on ledges sothat the brick or bricks below any'unit can be readily removed to allow the Withdrawal of the unit through the opening so made.

2. In a boiler comprising a bank of upright tubes and a furnace forward of them, the combination of a chamber forward of the tubes and above the furnace, a superheater in the chamber comprising tubular units secured detachably to a header, the chamber being separated from the furnace by two rows of spaced firebricks, the bricks of one row being opposite the spaces of the other, the ends of the bricks resting on two sets of parallel ledges, whereby-the size of the spaces can readily be regulated and whereby an opening can readily be made from the chamber to the furnace opposite any desired superheater unit for its inspection, removal, or replacement, without disturbing the remainder of the bricks,

3. In a boiler having upper and lower drums and water tubes connecting them, the combination of a superheater forward of the tubes and above the furnace, a front wall forward of the superheate'r, a partition between the superheater and the boiler tubes, doors in the front wall, doors in the partition opposite those in the front wall and opening to' pressure from the front side and closing when the pressure is removed.

4. In a boiler having upper and lower drums and tubes connecting them and a furnace forward of the tubes, the combination of a superheater located forward of the tubes and above the furnace and comprising units detachably secured to a header, and means to protect the superheater against all direct radiation from thefurnace but the superheater units.

5. In a boiler having upper and lower drums and tubes connecting them and a furnace forward of the tubes, the combination of a superheater forward of the tubes and above the furnace and comprising units detachably secured to a header, and means to protect the superheater against all direct radiation from the furnace but permitting hot gases from the furnace to reach it, said means comprising a plurality of superposed rows of separate fire bricks resting loosely on supportingledges.

"BENJAMIN BROIDO.

readily removable to allow the passage of 

